利用idea创建一个基本的smm项目（带增删改查）
作者：互联网
环境 idea jdk1.8 tomcat mysql
打开idea选择创建一个maven项目
然后点击next，next，finsh
然后看项目的结构
如图所示
接着创建com包，再在com包下新建四个包，分别命名为：
自定义pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.li</groupId>
<artifactId>ssm_test_2</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>
<name>ssm_test_2 Maven Webapp</name>
<!-- 用来设置版本号 -->
<properties>
<srping.version>4.0.2.RELEASE</srping.version>
<mybatis.version>3.2.8</mybatis.version>
<slf4j.version>1.7.12</slf4j.version>
<log4j.version>1.2.17</log4j.version>
<druid.version>1.0.9</druid.version>
</properties>
<!-- 用到的jar包 -->
<dependencies>
<!-- servlet依赖的jar包start -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
</dependency>
<!-- servlet依赖的jar包start -->
<!-- jsp依赖jar包start -->
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>javax.servlet.jsp-api</artifactId>
<version>2.3.1</version>
</dependency>
<!-- 单元测试 -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<!-- 表示开发的时候引入，发布的时候不会加载此包 -->
<scope>test</scope>
</dependency>
<!-- spring框架包 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${srping.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${srping.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-oxm</artifactId>
<version>${srping.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${srping.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${srping.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>${srping.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${srping.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>${srping.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-expression</artifactId>
<version>${srping.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>${srping.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${srping.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${srping.version}</version>
</dependency>
<!-- spring框架包 -->
<!-- mybatis框架包 -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis.version}</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.2.2</version>
</dependency>
<!-- mybatis框架包 -->
<!-- 数据库驱动 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.35</version>
</dependency>
<!-- 导入dbcp的jar包，用来在applicationContext.xml中配置数据库 -->
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>1.2.2</version>
</dependency>
<!-- jstl标签类 -->
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<!-- log -->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>${log4j.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${slf4j.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>${slf4j.version}</version>
</dependency>
<!-- 连接池 -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>${druid.version}</version>
</dependency>
</dependencies>
<build>
<!-- 如果不添加此节点mybatis的mapper.xml文件都会被漏掉。 -->
<resources>
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<filtering>false</filtering>
</resource>
<resource>
<directory>src/main/resources</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<filtering>false</filtering>
</resource>
</resources>
<!-- java编译插件,如果maven的设置里配置好jdk版本就不用 -->
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.2</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
<encoding>UTF-8</encoding>
</configuration>
</plugin>
</plugins>
</build>
</project>
在resource包下新建Directory:mapper(用来放xxMapper.xml)
添加jdbc.properties和lo4j.properties文件
jdbc.properties
driver=com.mysql.jdbc.Driver url=jdbc\:mysql\://localhost\:3306/test username=root password=123456 initialSize=0 maxActive=20 maxIdle=20 minIdle=1 maxWait=60000
lo4j.properties文件
log4j.rootLogger=DEBUG,CONSOLE,file
#log4j.rootLogger=ERROR,ROLLING_FILE
log4j.logger.com.qhit.dao=debug
log4j.logger.com.ibatis=debug
log4j.logger.com.ibatis.common.jdbc.SimpleDataSource=debug
log4j.logger.com.ibatis.common.jdbc.ScriptRunner=debug
log4j.logger.com.ibatis.sqlmap.engine.impl.SqlMapClientDelegate=debug
log4j.logger.java.sql.Connection=debug
log4j.logger.java.sql.Statement=debug
log4j.logger.java.sql.PreparedStatement=debug
log4j.logger.java.sql.ResultSet=debug
log4j.logger.org.tuckey.web.filters.urlrewrite.UrlRewriteFilter=debug
######################################################################################
# Console Appender 日志在控制输出配置
######################################################################################
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.Threshold=error
log4j.appender.CONSOLE.Target=System.out
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern= [%p] %d %c - %m%n
######################################################################################
# DailyRolling File 每天产生一个日志文件，文件名格式:log2009-09-11
######################################################################################
log4j.appender.file=org.apache.log4j.DailyRollingFileAppender
log4j.appender.file.DatePattern=yyyy-MM-dd
log4j.appender.file.File=log.log
log4j.appender.file.Append=true
log4j.appender.file.Threshold=error
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{yyyy-M-d HH:mm:ss}%x[%5p](%F:%L) %m%n
log4j.logger.com.opensymphony.xwork2=error
然后创建applicationContext.xm
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
<!-- 加载properties文件 -->
<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location" value="classpath:jdbc.properties"/>
</bean>
<!-- 配置数据源 -->
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName" value="${driver}"/>
<property name="url" value="${url}"/>
<property name="username" value="${username}"/>
<property name="password" value="${password}"/>
</bean>
<!-- mybatis和spring完美整合，不需要mybatis的配置映射文件 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<!-- 扫描model包 -->
<property name="typeAliasesPackage" value="com.lwy.pojo"/>
<!-- 扫描sql配置文件:mapper需要的xml文件-->
<property name="mapperLocations" value="classpath:mapper/*.xml"/>
</bean>
<!-- Mapper动态代理开发，扫描dao接口包-->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!-- 注入sqlSessionFactory -->
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
<!-- 给出需要扫描Dao接口包 -->
<property name="basePackage" value="com.lwy.mapper"/>
</bean>
<!-- 事务管理 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<!--数据库连接池-->
<property name="dataSource" ref="dataSource"/>
</bean>
</beans>
创建sping-mvc.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">
<!-- 扫描注解，这样com.xjt包下的文件都能被扫描 -->
<context:component-scan base-package="com.lwy"/>
<!-- 开启SpringMVC注解模式 -->
<mvc:annotation-driven/>
<!-- 静态资源默认servlet配置 -->
<mvc:default-servlet-handler/>
<!-- 配置返回视图的路径，以及识别后缀是jsp文件 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
<property name="prefix" value="/"/>
<property name="suffix" value=".jsp"/>
</bean>
</beans>
接着在webapp下WEB-INF配置web.xml
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
version="3.1">
<display-name>mvcDemo</display-name>
<welcome-file-list>
<welcome-file>/pages/index.jsp</welcome-file>
</welcome-file-list>
<!-- 注册ServletContext监听器，创建容器对象，并且将ApplicationContext对象放到Application域中 -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- 指定spring核心配置文件 -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<!-- 解决乱码的过滤器 -->
<filter>
<filter-name>CharacterEncodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>utf-8</param-value>
</init-param>
<init-param>
<param-name>forceEncoding</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>CharacterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- 配置前端控制器 -->
<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!-- 指定配置文件位置和名称 如果不设置,默认找/WEB-INF/<servlet-name>-servlet.xml -->
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-mvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
<async-supported>true</async-supported>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
</web-app>
数据库创建一个表
DROP TABLE IF EXISTS `user`; CREATE TABLE `user` ( `id` varchar(200) NOT NULL, `name` varchar(200) CHARACTER SET utf8 NOT NULL, `pwd` varchar(200) CHARACTER SET utf8 NOT NULL ) ENGINE=InnoDB DEFAULT CHARSET=latin1;
可以先添加数据方便测试
INSERT INTO `user` VALUES ('2', '22', '44');
INSERT INTO `user` VALUES ('5', '123', '123');
INSERT INTO `user` VALUES ('1', '123s', '123');
开始编写代码
pojo代码
package com.lwy.pojo;
public class User {
private String id;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
private String name;
private String pwd;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPwd() {
return pwd;
}
public void setPwd(String pwd) {
this.pwd = pwd;
}
}
mapper
package com.lwy.mapper;
import com.lwy.pojo.User;
import org.apache.ibatis.annotations.Param;
import java.util.List;
public interface UserMapper {
User userlogin(@Param("name")String name, @Param("pwd") String pwd);
int adduser(User user);
int delteuser(String id);
int updateuser(User user);
User getById(String id);
List<User> getallUser();
}
xxMapper.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper SYSTEM "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="com.lwy.mapper.UserMapper">
<resultMap id="ResultMap" type="User">
<id property="userid" column="user_id"></id>
<result property="name" column="name"></result>
<result property="pwd" column="pwd"></result>
</resultMap>
<select id="userlogin" resultType="User">
SELECT * FROM `user` WHERE `name`=#{name} AND pwd=#{pwd}
</select>
<insert id="adduser" parameterType="User">
INSERT INTO user(id,name,pwd) VALUES(#{id},#{name},#{pwd})
</insert>
<delete id="delteuser" parameterType="String">
delete from user where id=#{id}
</delete>
<update id="updateuser" parameterType="User">
UPDATE user SET NAME=#{name}, pwd=#{pwd} WHERE id=#{id}
</update>
<select id="getById" parameterType="String" resultMap="ResultMap">
SELECT * FROM user WHERE id=#{id}
</select>
<select id="getallUser" resultMap="ResultMap">
SELECT * FROM user
</select>
</mapper>
service层
package com.lwy.service;
import com.lwy.pojo.User;
import org.apache.ibatis.annotations.Param;
import java.util.List;
public interface UserService {
User userlogin(@Param("name") String name, @Param("pwd") String pwd);
int adduser(User user);
int delteuser(String id);
int updateuser(User user);
User getById(String id);
List<User> getallUser();
}
实现
package com.lwy.service.impl;
import com.lwy.pojo.User;
import com.lwy.mapper.UserMapper;
import com.lwy.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
import java.util.UUID;
@Service
public class UserServiceImpl implements UserService {
@Autowired
UserMapper userMapper;
@Override
public int adduser(User user) {
String id = UUID.randomUUID().toString();
user.setId(id);
return userMapper.adduser(user);
}
@Override
public int delteuser(String id) {
return userMapper.delteuser(id);
}
@Override
public int updateuser(User user) {
return userMapper.updateuser(user);
}
@Override
public User getById(String id) {
return userMapper.getById(id);
}
@Override
public List<User> getallUser() {
return userMapper.getallUser();
}
@Override
public User userlogin(String name, String pwd) {
return userMapper.userlogin(name, pwd);
}
}
controller层
package com.lwy.controller;
import com.lwy.pojo.User;
import com.lwy.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import java.util.List;
@Controller
public class UserController {
@Autowired
UserService userService;
@RequestMapping("/login.do")
public String login(String username, String password,Model model){
System.out.println("开始登陆");
userService.userlogin(username,password);
// System.out.println("开始查询所有用户");
// List<User> userlist = userService.getallUser();
// model.addAttribute("userlist",userlist);
return "redirect:/getAllUser.do";
}
@RequestMapping("/addUser.do")
public String addUser(User user){
userService.adduser(user);
return "redirect:/getAllUser.do";
}
@RequestMapping("/deleteUser.do")
public String deleteUser(String id){
userService.delteuser(id);
return "redirect:/getAllUser.do";
}
@RequestMapping("/updateUser.do")
public String updateUser(User user){
userService.updateuser(user);
return "redirect:/getAllUser.do";
}
@RequestMapping("/getById.do")
public String getUserById(String id,Model model){
model.addAttribute("user",userService.getById(id));
return "pages/user_update";
}
@RequestMapping("/getAllUser.do")
public String getAllUser(Model model){
System.out.println("开始查询所有用户");
List<User> userlist = userService.getallUser();
model.addAttribute("userlist",userlist);
return "pages/userlist";
}
}
部署到tomcat中
如图
选择本地的tomcat 
页面
登陆
<%--
Created by IntelliJ IDEA.
User: hasee
Date: 2019/6/3
Time: 16:03
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<form action="../login.do" method="post">
账号：<input type="text" name="username" />
密码：<input type="password" name="password" />
<button type="submit">提交</button>
</form>
</body>
</html>
显示
<%--
Created by IntelliJ IDEA.
User: hasee
Date: 2019/6/3
Time: 18:27
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
<title>Title</title>
</head>
<body>
列表
<a href="/pages/user_add.jsp">添加</a>
<a href="/pages/logout.do">退出</a>
<a href="/pages/admin.jsp">admin page</a>
<table>
<tr>
<td>id</td>
<td>姓名</td>
<td>密码</td>
<td>操作</td>
</tr>
<c:forEach items="${requestScope.userlist}" var="list">
<tr>
<td>${list.id}</td>
<td>${list.name}</td>
<td>${list.pwd}</td>
<td>
<a href="../getById.do?id=${list.id}">修改</a>
<a href="../deleteUser.do?id=${list.id}">删除</a>
</td>
</tr>
</c:forEach>
</table>
</body>
</html>
添加
<%--
Created by IntelliJ IDEA.
User: hasee
Date: 2019/6/3
Time: 20:18
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<form method="post" action="../addUser.do">
你的账号<input type="text" name="name">
你的密码<input type="text" name="pwd" />
<button type="submit">保存</button>
</form>
</body>
</html>
修改
<%--
Created by IntelliJ IDEA.
User: hasee
Date: 2019/6/3
Time: 20:18
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<form method="post" action="../updateUser.do">
<input type="hidden" name="id" value="${requestScope.user.id}"/>
gfdshjsahsdhsdhsdhsd
你的账号<input type="text" name="name" value="${requestScope.user.name}"/>
你的密码<input type="text" name="pwd" value="${requestScope.user.pwd}"/>
<button type="submit">修改</button>
</form>
</body>
</html>
标签：String,改查,idea,id,public,smm,user,org,log4j 来源： https://www.cnblogs.com/l-wy/p/10991636.html